Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-02-21
Astronomy and Astrophysics
Astrophysics
2 pages, 2 figures, proceedings of "From stars to galaxies", Venice October 2006, to be published in the Astronomical Society
Scientific paper
The considerable scatter of the s- and r-process elements observed in low-metallicity stars, compared to the small star to star scatter observed for the alpha elements, is an open question for the chemical evolution studies. We have developed a stochastic chemical evolution model, in which the main assumption is a random formation of new stars, subject to the condition that the cumulative mass distribution follows a given initial mass function. With our model we are able to reproduce the different features of alpha-elements and s-and r-process elements. The reason for this resides in the random birth of stellar masses coupled with the different stellar mass ranges from where alpha-elements and s-and r-process elements originate. In particular, the sites of production of the alpha elements are the whole range of the massive stars, whereas the mass range of production for the s- and r-process elements has an upper limit of 30 solar masses.
No associations
LandOfFree
Inhomogeneous Galactic halo: a possible explanation for the spread observed in s- and r- process elements does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Inhomogeneous Galactic halo: a possible explanation for the spread observed in s- and r- process elements, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Inhomogeneous Galactic halo: a possible explanation for the spread observed in s- and r- process elements will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-83703